The proud parents sent an email to friends and family announcing their happy news, with a cute picture of the baby boy lying in a Christmas stocking.

Ryan had previously hinted he was to become a dad.

In October he told The Hollywood Reporter he was hoping to start a family soon.

He joked: "I think I'll be incredibly fun and overwhelmed and all about manners. I'm excited to have somebody or something come in and say, 'Really? I don't care what you think. I'm going to do what I want'."